CVE-2021-23135

Secret disclosure via unredacted update errors

Published May 12, 2021 · Updated Sep 16, 2024

Sensitive-information exposure in Argo CD 1.7 before 1.7.14 and 1.8 before 1.8.7 allows local users to read Kubernetes Secret data. The application-resource update path returned an invalid Secret manifest body in a UI error, bypassing redaction, and logged the same plaintext JSON. Exploitation requires Application update permission, an edited Secret manifest, and invalid input such as a non-base64 value; disclosed data reaches the UI, server logs, and connected log-management systems.

CVSS severity5.9
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive-information exposure in Argo CD 1.7 before 1.7.14 and 1.8 before 1.8.7 allows local users to read Kubernetes Secret data. The application-resource update path returned an invalid Secret manifest body in a UI error, bypassing redaction, and logged the same plaintext JSON. Exploitation requires Application update permission, an edited Secret manifest, and invalid input such as a non-base64 value; disclosed data reaches the UI, server logs, and connected log-management systems.

The record

CVE
CVE-2021-23135
Published
May 12, 2021
Updated
Sep 16, 2024
Vendor
Argo Project
Product
Argo CD
Classifications
CWE-209, CWE-497, CWE-200, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.7 <1.7.14
  2. Affected versionversion=1.8 <1.8.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Argo Project · Argo CDversion=1.7 <1.7.14; version=1.8 <1.8.7

Published CVSS scores

5.9Argo ProjectCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
2.1NISTAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
CWE-497Exposure of Sensitive System Information to an Unauthorized Control Sphere
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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